Silent Pro Hybrid 850W is part of Cooler Master’s first fully modular power supply series with integrated dual 7V fan ports. It utilizes a single powerful +12V rail that operates at over 90% efficiency and carries an 80Plus Gold certification. A fan speed controller is included in the package. It occupies a 5.25″ drive bay and enables a user to control the Silent Pro Hybrid 135mm Silent Hydraulic Bearing fan along with up to three system fans. single 12V rail, these power supplies deliver where it counts and won’t have any problems powering even the most demanding multi-graphic card systems. Specifications: These units feature flat modular cables for improved airflow and cable management. It also comes with shock absorption silicon pads to remove possible vibrations.